Thanks Jeff, I would love to try a Moth sometime, as long as the water is warm, because that's probably where I'll spend most of my time!
When I watched that video (above) I was really surprized the kite board could get upwind as well, or better, than the Moth, and that the both waxed the 49'er upwind. The wind looked about 10kts or less, no whitecaps, I'm guessing if it were stronger, the kite would have done even better.
The kite does seem to run a lower angle, but makes up for it in speed, going a much further distance than the moth, but then passing him when he tacks and comes back. But going downind, not even close. The only race the Moth won, was when the kite crashed.